Siltstone Member

Geology

Formation: Chinle

Lithologies: mudstone (1), siltstone (1), conglomerate (2)

Paleoenvironments: fluvial indet. (1), crevasse splay (1)

Age range: base of the Wonokan to the top of the Castlecliffian or 580.00000 to 0.34000 Ma
Collections

Oldest occurrences

Time interval Ma Country or state Original ID and collection number
Wonokan - Poundian580.0 - 538.8Canada (Yukon) (10355 10356 10357 10358 10359 10360 10361 10362 10363 10364 10365 10366 10367 10368 10369 10370 10371)
Ordian511.2 - 508.0Australia (South Australia) (97728)
Delamaran511.2 - 506.5USA (Idaho) (90589)
Lancefieldian484.3 - 474.9Australia (Tasmania) (165772 186101 186102)
Lancefieldian484.3 - 474.9Australia (Victoria) (204418 204419 204421)
Lancefieldian - Bendigonian484.3 - 473.1Australia (Tasmania) (211106 211109)
Floian477.7 - 470.0Australia (Northern Territory) (210676)
Bendigonian474.9 - 473.1Australia (New South Wales) (119704)
Bendigonian474.9 - 473.1Australia (Northern Territory) (90417)
Bendigonian474.9 - 473.1Australia (Tasmania) (186103 186104 186105 210901)

Youngest occurrences
Time interval Ma Country or state PBDB collection number
Early/Lower Miocene23.03 - 15.97New Zealand (Waikato) (45004 45009)
Otaian21.7 - 19.0New Zealand (West Coast) (172797)
Altonian19.0 - 15.9New Zealand (South Island) (219341 219598 219621)
Middle Miocene15.97 - 11.608Ecuador (Guayas) (61078 61079 61080 61081 61082 61083 61084 61085 61086 61087 61088 61089 61090 61091 61092)
Clifdenian15.9 - 13.65New Zealand (South Island) (219623)
Serravallian13.82 - 11.62Italy (Pordenone) (37374)
Late/Upper Miocene - Early/Lower Pliocene11.608 - 3.6Dominican Republic (228622 228619 228623 228624 228625 228626 228627 228628 228629)
Pliocene5.333 - 2.588Japan (Ishikawi) (53885)
Nukumaruan2.4 - 1.63New Zealand (74757)
Castlecliffian1.63 - 0.34New Zealand (South Island) (219626)